| 摘要 |
PROBLEM TO BE SOLVED: To provide the covered hard tool improving wear resistance and deposition resistance. SOLUTION: A hard covered layer 4 is formed on a hard base material, in the covered layer 4, primary partial layers 4A, 4B consisting of a kind A and a kind B are alternately laminated by >=10 layers, in the primary partial layer 4A of the kind A, plural kinds of secondary partial layers having a thickness of 1-50 nm are periodically and repeatedly laminated, the primary partial layer 4B of the kind B is formed in a single layer, these primary partial layers 4A, 4B have respectively a thickness of 100-5000 nm, respective partial layer is formed as containing one kind or more compounds among nitride, carbide, carbonitride, oxide selected from at least one kind element selected among a 4A group element, a 5A group element, Al, B. |
